Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map 1 I. Data Preparation At this part, it will be shown the stages of process on preparing all types of data which required in making of landslide potential and banjir bandang hazard map. I.1. Digitize landslide region and micro-topography using satellite image Step 1. Open ArcMap 1) Run ArcMap . 2) Window of “ArcMap - Getting Started” will open. At this window, click New Maps Blank Map then click OK. 3) ArcMap’s workspace will appear. At toolbar Standard, click Add Data button. Window of Add Data will appear. At the part of Look in, move the pointer to folder: Data source for training. 4) Double click to folder “01 Satellite image”, then choose file “citra satelit.tif”. Click Add button.
20
Embed
Training Module Making Landslide Potential Map and Banjir ... · Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map 2 5) The view will appear as below. Step
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
1
I. Data Preparation
At this part, it will be shown the stages of process on preparing all types of data which required in
making of landslide potential and banjir bandang hazard map.
I.1. Digitize landslide region and micro-topography using satellite image
Step 1. Open ArcMap
1) Run ArcMap .
2) Window of “ArcMap - Getting Started” will open. At this window, click New Maps Blank
Map then click OK.
3) ArcMap’s workspace will appear. At toolbar Standard, click Add Data button. Window of
Add Data will appear. At the part of Look in, move the pointer to folder: Data source for
training.
4) Double click to folder “01 Satellite image”, then choose file “citra satelit.tif”. Click Add button.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
2
5) The view will appear as below.
Step 2. Making data of past landslide events.
The picture above is a cross sectional view of the topography of hill with landslide. If the topography
is interpreted from above, for example using satellite image, it is possibly that there will be two
results of interpretation, which are interpretation of “landslides material” and interpretation of
“major landslides”. The things that should be interpreted and digitized are only a part of “major
landslide or landslide region”.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
3
1) At ArcMap workspace, move cursor to Catalog button. And the Catalog window will appear
automatically.
2) Click symbol + at the Folder Connections, symbol + at Data source for training, and choose the
folder: 01 Satellite Image.
3) Right click on the folder: 01 Satellite image, move cursor to New, then click Shapefile.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
4
4) At Create New Shapefile window, at text box Name, fill in: “area longsoran masa lalu” and at
text box Feature Type, fill in: Polygon.
5) To choose the coordinate and projection system of a spatial data, click Edit button at Create
New Shapefile window.
6) At the Spatial Reference Properties window, click Select button.
7) At Browse for Coordinate System window, follow the steps as shown in the folder below:
Projected Coordinate System UTM WGS 1984 Southern Hemisphere.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
5
8) Select “WGS 1984 UTM Zone 49S”, then click Add button at Browse for Coordinate System
window, click OK button at Spatial Reference Properties window, and click OK at Create New
Shapefile window.
All of spatial data that use in this training module are using UTM 49S system coordinate
(Jember area) with WGS 1984 system projection.
9) A new shapefile will automatically enter to the ArcMap workspace.
10) To make or edit spatial data, we need Editor tool. If ArcMap workspace does not have toolbar
Editor yet, right click on blank random area at ArcMap workspace, then click Editor.
11) Then Editor toolbar will appear as below. This toolbar can be placed in specific locations in
ArcMap workspace, in order to make ArcMap workspace more properly.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
6
12) On toolbar Tool, click Zoom In button , move cursor to some specific area of the upstream
of Jember river and zoom it in as seen in the picture below.
13) Spatial data of “area longsoran masa lalu.shp” is made by interpret and digitize an area of
landslide using satellite image. The area that pointed by an arrow as shown in the picture
above is the predictable area of the landslides.
To start digitizing the landslide area, at the Editor toolbar, click Editor and click Start Editing.
14) On the right of ArcMap workspace, it will appear a window named Create Features, and
Construction Tools at the bottom part. Click “area longsoran masa lalu” layer, and at
Construction Tools, select Polygon.
15) Click icon (Straight Segment) on Editor toolbar.
16) The example of landslide area digitizing process is shown as the picture on the left side. Press
F2 button on the keyboard to finish the digitization (the picture at the right side).
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
7
17) Do the interpretation and digitization process of landslide area for the whole scope of study
area by using satellite image.
18) If the interpretation and digitization process of landslide area is done, click Editor button, click
Save Edits button, then click stop Editing. By this time, all of the digitized data are already
stored in the “area longsoran masa lalu.shp” data.
19) To change the data view of “area longsoran masa lalu.shp”, right click on “area longsoran masa
lalu” layer, then click Properties.
20) On Layer Properties window, click Symbology tab. Click Symbol button which shown as below.
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
8
21) Afterward, a window of Symbol Selector will appear. Select Fill Color: Medium Coral Light, and
Outline Color: Mars Red, which shown as below, then click OK button.
22) To change the transparent view of a layer, click Display tab at Layer Properties window, then
fill the transparency value into Transparent text box, for examples 35%. Click OK button on
Layer Properties window.
23) Due to the need of training, we later will use data of “area longsoran masa lalu ref.shp” which
located inside the folder: Ref.
Step 3. Making micro-topography data
There are five types of micro-topography elements. The five elements will be illustrated as follow:
1) Ancient deep-seated landslide
2) Circular arc crack
3) Gentle ridge top
4) Linear depression
5) Mass rock creep slope
Training Module Making Landslide Potential Map and Banjir Bandang Hazard Map
9
Similar to the process of making data of “area longsoran masa lalu”, in the process of making micro-
topography data, we need satellite image to interpret and digitize the micro-topography elements
which appropriate with the characteristics of micro-topography elements as described above.
1) From several micro-topography elements, in this training we will make one of micro-
topography elements i.e. Circular arc crack. The data is made by refer to the procedure of Step
2.
The data then is stored at folder: Data source for training\01 Satellite image, and have the